package com.alphay.boot.web.controller.monitor;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.Set;

import com.alphay.boot.common.constant.CacheConstants;
import com.alphay.boot.common.core.domain.AjaxResult;
import com.alphay.boot.common.utils.StringUtils;
import com.alphay.boot.system.common.domain.SysCache;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisCallback;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.security.access.prepost.PreAuthorize;
import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * 缓存监控
 *
 * @author d3code
 */
@RestController
@RequestMapping("/monitor/cache")
public class CacheController {
  @Autowired private RedisTemplate<String, String> redisTemplate;

  private static final List<SysCache> caches = new ArrayList<SysCache>();

  {
    caches.add(new SysCache(CacheConstants.LOGIN_TOKEN_KEY, "用户信息"));
    caches.add(new SysCache(CacheConstants.SYS_CONFIG_KEY, "配置信息"));
    caches.add(new SysCache(CacheConstants.SYS_DICT_KEY, "数据字典"));
    caches.add(new SysCache(CacheConstants.CAPTCHA_CODE_KEY, "验证码"));
    caches.add(new SysCache(CacheConstants.REPEAT_SUBMIT_KEY, "防重提交"));
    caches.add(new SysCache(CacheConstants.RATE_LIMIT_KEY, "限流处理"));
    caches.add(new SysCache(CacheConstants.PWD_ERR_CNT_KEY, "密码错误次数"));
  }

  @PreAuthorize("@ss.hasPermi('monitor:cache:list')")
  @GetMapping()
  public AjaxResult getInfo() throws Exception {
    Properties info =
        (Properties) redisTemplate.execute((RedisCallback<Object>) connection -> connection.info());
    Properties commandStats =
        (Properties)
            redisTemplate.execute(
                (RedisCallback<Object>) connection -> connection.info("commandstats"));
    Object dbSize =
        redisTemplate.execute((RedisCallback<Object>) connection -> connection.dbSize());

    Map<String, Object> result = new HashMap<>(3);
    result.put("info", info);
    result.put("dbSize", dbSize);

    List<Map<String, String>> pieList = new ArrayList<>();
    commandStats
        .stringPropertyNames()
        .forEach(
            key -> {
              Map<String, String> data = new HashMap<>(2);
              String property = commandStats.getProperty(key);
              data.put("name", StringUtils.removeStart(key, "cmdstat_"));
              data.put("value", StringUtils.substringBetween(property, "calls=", ",usec"));
              pieList.add(data);
            });
    result.put("commandStats", pieList);
    return AjaxResult.success(result);
  }

  @PreAuthorize("@ss.hasPermi('monitor:cache:list')")
  @GetMapping("/getNames")
  public AjaxResult cache() {
    return AjaxResult.success(caches);
  }

  @PreAuthorize("@ss.hasPermi('monitor:cache:list')")
  @GetMapping("/getKeys/{cacheName}")
  public AjaxResult getCacheKeys(@PathVariable String cacheName) {
    Set<String> cacheKeys = redisTemplate.keys(cacheName + "*");
    return AjaxResult.success(cacheKeys);
  }

  @PreAuthorize("@ss.hasPermi('monitor:cache:list')")
  @GetMapping("/getValue/{cacheName}/{cacheKey}")
  public AjaxResult getCacheValue(@PathVariable String cacheName, @PathVariable String cacheKey) {
    String cacheValue = redisTemplate.opsForValue().get(cacheKey);
    SysCache sysCache = new SysCache(cacheName, cacheKey, cacheValue);
    return AjaxResult.success(sysCache);
  }

  @PreAuthorize("@ss.hasPermi('monitor:cache:list')")
  @DeleteMapping("/clearCacheName/{cacheName}")
  public AjaxResult clearCacheName(@PathVariable String cacheName) {
    Collection<String> cacheKeys = redisTemplate.keys(cacheName + "*");
    redisTemplate.delete(cacheKeys);
    return AjaxResult.success();
  }

  @PreAuthorize("@ss.hasPermi('monitor:cache:list')")
  @DeleteMapping("/clearCacheKey/{cacheKey}")
  public AjaxResult clearCacheKey(@PathVariable String cacheKey) {
    redisTemplate.delete(cacheKey);
    return AjaxResult.success();
  }

  @PreAuthorize("@ss.hasPermi('monitor:cache:list')")
  @DeleteMapping("/clearCacheAll")
  public AjaxResult clearCacheAll() {
    Collection<String> cacheKeys = redisTemplate.keys("*");
    redisTemplate.delete(cacheKeys);
    return AjaxResult.success();
  }
}
